Our selection of abrasive cartridge rolls have a self-renewing feature of wearing through one layer of abrasive cloth to uncover the layer beneath. This makes them an excellent tool for blending where uniform finishes are required. Ideal for finishing inside rings and dead-end holes and for lapping. Made with resin-bonded aluminum oxide. Maximum operating speed: 16,000-22,000rpm. Made in South Korea. Sold in boxes of 100. The arbor hole (AH) of the roll determines the mandrel you should use (sold separately).